<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>Event</title>
    <style>
      * {
        margin: 0;
        padding: 0;
      }

      div {
        width: 200px;
        height: 200px;
        background-color: red;
      }

      ul {
        width: 200px;
        height: 200px;
        background-color: blue;
      }

      li {
        width: 50px;
        height: 50px;
        background-color: green;
      }
    </style>
  </head>

  <body>
    <div id="event"></div>

    <ul>
      <li>1</li>
      <li>2</li>
      <li>3</li>
    </ul>

    <script src="./event.js"></script>
  </body>
</html>
